PHOTOFACT* Folder HALLICRAFTERS

MODELS 5-76, 5-76U

BAND SELECTOR SWITCH

TRADE NAME

NOISE LIMITER SWITCH

TS:,~~S~~M~OL SELECTIYITY SWITCH

Hallicrafters, Models S-76, S"-76lJ

MANUFACTURER The Hallicrafters Co., 5th . and Kostner Avenues, C.hlcago, Illinois

TYPE SET AC Operated Mult"'Band Superheterodyne Communications Type Receiver

STANDBY RECEIYE SWITCH

TONE CONTROL ON·OFF SWITCH

TUBES (ELEVEN) Types 6CB6 RF Amp., 6AU6 1650KC Mixer , 6C4 Oscillator , 6BA6 1650KC IF Amp ., 6BE650KC Converter , 6BA6 50KC IF Amp . , 6AL5 DET-AVC-Noise Limiter , 6SC7 AF Amp.-BFO, 6K6GT Power Output , VR-150/ 0D3 Voltage Regulator, 5Y3GT Rectifier

POWER SUPPLY 105-125 Volts AC (Model S-76), !O5 or 250 Volts AC (Model S-76U)

RATING .71 Amp. at 117 Volts AC

TUNING RANGE Band I 538-1580KC, Band 2 1720KC-4.9MC Band 3 4 . 6-13MC Band 4 12-34MC

HOWARD W. SAMS & CO., INC. • Indianapolis 5, Indiana " The listing of any available replacement part herein does no' constitute in any case a recommendation, warranty or guaranty by Howard W . Sams & Co., Inc., as to the quality and suitability of such replacement part. The numbers of these parts hove been compiled from information furnished to Howard W . Sams & Co., Inc., by the manufacturers of the particular type of replacement part listed." " Reproduction or use, without express permission, of editorial or pictorial con-

tent, in any monner, is prohibited. No potent liability is assumed with respect to the use of the information contained herein . Copyright 1952 by Howard W. Sams & Co., Inc., Indianapolis 5, Indiana, U. S. of America . Copyright under In­ternational Copyright Union. All rights reserved under Inter-American Copyright Union (191 Q) by Howard W . Sams & Co., Inc." Printed in U. S. of America

DATE 9 -51 SET 143 FOLDER 9

n9 L-S '9 L-S S13QOW S1I31:lVlIJI11VH

ITEM No.

VI V2 V3 V4 V5 V6 V7

VS V9 VlO Vll

ITEM No.

PARTS LIST AND DESCRIPTIONS TUBES (SYlVANIA or Equivalent)

REPLACEMENT DATA RMA USE Hallicrafters BASE INSTALLATION NOTES STANDARD

TYPE PART No. REPLACEMENT RF Amplifier 90X6CB6 6CB6 6CK 1650KC Mixer 9OX6AU6 6AU6 7BK Oscillator 90X6C4 6C4 6BG 1650KC IF Amp. 90X6BA6 6BA6 7BK 50KC Converter 90X6BE6 6BE6 7CH 50KC IF Amplifier 90X6BA6 6BA6 7BK Detector -A VC-Noise Limiter 90X6AL5 6AL5 6BT AF Ampllfler-BFO 9OX6SC7 6SC7 8S Power Output 9OX6K6GT 6K6GT 7S Voltage Regulator VR150/0D3 VR150/DD3 4AJ R"cuflltr ~XmGT 5Y3GT 5T

CAPACITORS Capacity value. given in the rating column are in mfcl. for Electrolytic and Papar Capacitors, and in mmfcl. for Mica and Ceramic Capacitor ••

REPLACEMENT DATA IDENTIFICATION CODES RATING Hallicrafters CORNELL· AEROVOX CENTRAlAB ERIE SPRAGUE AND CAP. VOLT PART No. PART No. PART No. DUBILIER PART No. PART No. INSTALLATION NOTES PART No. CiA roo- 450 45B1l3 UPT62246 jTVL-3790 • Filter

B 20 450 'l'VA-1705 • Filter C 20 450 .& Filter

C2 10 25 45AI21 PRS25/l0 BRl02A TVA-1204 Output Cathode C3 220 47B2022IK5 SI220 D6-221 5R5T25 GP2K-221 5GA.-T22 RF Coupling C4 5000 47AI68 BPD-005 DD-502 105D5 Sll-005 5HK-D5 RF Amp. Screen C5 5000 47AI68 BPD-005 DD-502 105D5 811-005 5HK-D5 RF Amp. Cathode C6 5000 47AI6S ,BPD-005 DD-502 105D5 Sll-005 5HK-D5 AVC Filter C7 2.2 47A160-4 TCZ-2.2 NPOK-2R2 Fixed Trimmer CS 220 47B20221K5 SI220 D6-221 5R5T25 GP2K-221 5GA-T22 RF Bypass C9 5000 47AI6S BPD-005 DD-502 105D5 Sll-005 5HK-D5 RF Bypass CIO 25 47X20UK25OK N75OK-250 5TCU-Q25 RF Coupling Cll 2.2 47A160-4 TCZ-2.2 NPOK-2R2 RF Coupling CI2 100 47X20unOIK snOON750 TCN-100 N750L-IOI ~TCU-TI RF Coupling CIS 2.2 47A160-4 TCZ-2.2 NPOK-2R2 Osc. Coupling CI4 5000 47A16S BPD-005 DD-502 105D5 Sll-005 HK-D5 1650KC Mixer Plate CI5 5000 47AI68 BPD-005 DD-502 105D5 8ll-005 5HK-D5 1650 KC Mixer Screen CI6 100 47X20unOIK snOON750 TCN-100 N750L-101 5TCU-TI Osc. Feedback Cl7 100 47X20UnOIK SnOON750 TCN-IOO N750L-IOI 5TCU-TI Osc. Grid Cap. CI8 25 47X20UK250K N750K-250 5TCU-Q26 Fixed Trimmer CI9 2400 500 47X30D242J 1464-0025 1R5D25 Fixed Padder C20 1000 500 47X25Dl021 1464-001 IR5Dl MS-21 Fixed Padder C21 470 500 47X20B47lK 1469-0005 TCN-470 5R5T5 N750L-471 MS-35 Fixed Padder C22 5000 47AI68 BPD-005 DD-502 105D5 811-005 5HK-D5 1650KC Mixer Cathode C23 5000 47AI68 BPD-005 DD-502 105D5 811-005 5HK-D5 AVC Filter C24 5000 47AI68 BPD-005 DD-502 105D5 811-005 5HK-D5 1650KC IF Amp. Dec. C25 5000 47AI68 BPD-OD5 DD-502 105D5 811-005 5HK-D5 1650 K<.. IF Amp. Screen C26 5000 47AI68 BPD-005 DD-502 ID5D5 811-005 5HK-D5 1650 KL IF Amp. Lath ode C27 .05 200 46AUiOSJ P288-05 DF-503 PTE4S5 2TM-S5 Osc, Anode Dec. C2S 100 47X20U1l01K SnOON750 TCN-IOO N750L-101 5TCU-TI Osc. Grid Cap. C29 .05 200 46AU503J P288-05 DF-503 PTE4S5 2TM-S5 Conv. Cathode C30 100 47X20U1l01K SIl00N750 TCN-IOO N750L-10i 5TCU-TI Fixed Trimmer C31 2.2 47A160-4 TCZ-2.2 NPOK-2R2 IF Coupling C32 390 500 47X20D3911 1469-0004 TCN-390 5R5T4 N750L-391 MS-34 Fixed Trimmer C33 390 500 47X20D3911 1469-0004 TCN-390 5R5T4 N750L-391 MS-34 Fixed Trimmer C34 .05 200 46AU503J P288-05 DF-503 PTE4S5 2TM-S5 50KC Cony. Dec. C35 .02 600 46A4203J P688-02 DF-203 PTE6S2 6TM-S2 RF .bypass C36 .0047 600 46AIBI P688-0047 D6-472 GP2-333-472 6TM-D47 Fixed Padder C37 .01 600 46AI79 P688-0l D6-103 PTE6S1 GP2-333-103 6TM-SI Fixed Padder C38 .022 600 46AIBD \P688-022 6TM-S22 Fixed Padder C39 470 500 47X20B471K 1469-0005 TCN-470 5R5T5 N750L-471 MS-35 IF Coupling C40 .05 600 46AY5031 P688-05 DF-503 PTE6S5 6TM-S5 50KC IF Amp. Dec. C41 .05 600 46AY5031 P688-05 DF-503 PTE6S5 6TM-S5 50KC IF Amp. Screen C42 .25 200 46AT254J P488-25 GT2P25 2TM-P25 50Ke IF Amp. Cathode C43 2.2 47A160-4 TCZ-2.2 NPOK-2R2 IF Coupling C44 390 500 47K20D391J 1469-0004 TCN-390 5R5T4 N750L-391 MS-34 Fixed Trimmer C45 390 500 47X20D391J 1469-0004 TCN-390 5R5T4 N750L"391 MS-34 Fixed Trimmer C46 .0047 600 46AI81 P688-0047 D6-472 GP2-333-472 6TM-D47 Fixed Padder C47 .01 600 46AI79 P688-0l D6-103 PTE6S1 GP2-333-103 6TM-SI Fixed Padder

PARTS LIST AND DESCRIPTIONS (Continued) RESISTORS

REPLACEMENT DATA ITEM RATING Hallicrafters IRC No.

kS.ll!JANCE WATTS !'ART No. PART No. R28 15n

, 23X20XI5OK

R29 22Kn £ 23X20X223K BTS-22K R30 IOKn I 23X30Xl03K BTA-IOK R31 1500 t 23X20XI51K BTS-150 R32 3300n 23X2OX332K BTS-3300 R33 470n

J 23X20X471K BTS-470

R34 1800 23X20Xl81K R35 220n 23X20X221K R36 390n 23X2OX391K R37 IMeg t 23X20Xl05K BTS-IMeg R38 lOon 23X20XIOIK BTS-IOO R39 39Kn I 23X30X393K BTA-39K R40 33000 t 23X20X332K BTS-3300 R41 1800 23X20Xl81K R42 2200

I 23X20X221K R43 3900 23X20X391K R44 6.8n I 23X3DX068K R45 1.5Meg

f 23X20Xl55K BTS-1. 5Meg R46 IMeg 23X20XI05K BTS-IMeg R47 IMeg

f 23X20XI05K BTS-IMeg R4B B2Kn

1 23X20X823K BTS-B2K

R49 330Kn 23X20X334K BTS-330K R50 47Kn 23X20X473K BTS-47K R51 3.3Mog 23X20X335K BTS-3.3Meg R52 1000

I 23X2OXIOIK BTS-IOO

R53 470Kn 23X20X474K BTS-47OK R54 120Kn 23X20XI24K BTS-120K R55 3PKn 23X2OX393K BTS-39K R56 15Meg

f 23X20Xl56K BTS-15Mog

R57 220Kn 23X20X224K BTS-220K R58 470Kn 23X20X474K BTS-47OK R59 390n I 23X30X391K BTA-390 R60 5600 I 23X30X561K BTA-560 R61 390Kn i 23X20X394K BTS-39OK R62 30UO!l 10 24BG302E 13/4A-3000 R63 IOKn

, 23X20X103K BTS-IOK

Note 1 Some models use 2. 2Meg resistor in this application. Note 2 .Some models use lOOKU resistor in this application. Note 3 Some models use 4 'lKO resistor in this application. Note 4 Some models use 35OKO resistor in this application.

I

IDENTIFICATION CODES

Parasitic Supppessor 50KC Osc. Grid 50KC Osc. Anode 50KC Conv. Cathode 50KC Conv. Plate Decoupllng Bias Network Parasitic Suppressor Parasitic Suppressor Parasitic Suppressor 50KC IF Amp. Grid 50KC IF Amp. Cathode 50KC IF Amp. Screen 50KC IF Amp. Decoupllng Parasitic Suppressor Parasitic Suppressor Parasitic Suppressor Diode Filament ~oise Limiter Diode Load Voltage Divider Voltage Divider Det. Diode Load Det. Diode Load AVC Network AVC Network AVC Network Phono Input Shunt BFO Grid-See Nde 2 BFO Plate-See Note 3 AFAmp. Grid AF Amp. Plate Output Grid Output Cathode Output XFMR Shunt Bias Network-See Note 4 Voltage Regulator Load Filter

TRANSFORMER (POWER) ITEM No.

TI

ITEM

RATING Hallicrafters

PRI. SEC. 1 S C. 2 SEC. 3 PART No. f1l7VAC @.71A

j540VCT ~VAC .105ADC 2A

!t3VAC 52C221 3.5A 52C222 iD

(!) Used In model S-76U. (I) Add series resistor to reduce plate voltage. ® Drill new mounting holes.

REPlACEMENT DATA

STANCOR MERIT PART No. PART No.

P-3052 Ql

TRANSFORMER (AUDIO OUTPUT) RATING REPLACEMENT DATA

CHICAGO PART No.

PH-120 \lV

" No. IMPEDANCE DC RES.

Hallicrafters STANCOR MERIT CHICAGO INSTALlATION NOTES PRI. SE . PRI. ~EC. PART No. PART No. PART No. PART No.

T2 7Kn 1,5000 370n 152n 55BI20 A-3878 A2900 RO-13 Tap Tap AI).

3.2n

ITEM No.

--C48 C49 C50 C51 CS2 C53 CS4 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65

ITEM No.

RIA B

R2A B

R3A B C

R4

ITEM No.

5 6 7 8 9

R R R R R R R R R

10 11 12 13 14 15 ~:

-R :p:R c.:>R

16 17 18

R R R

...... R C::OR E;R .... R =R ""'R

19 20 21 22 23 24 2S 26 27

PARTS LIST AND DESCRIPTIONS (Continued) CAPACITORS

Capacity values given in the rating column are in mid. for Electrolytic and Paper Capacitor. and in mmfd. for Mica and Ceramic Capacitors. ,

REPLACEMENT DATA IDENTIFICATION CODES RATING Hallicrafters AEROVOX CENTRAlAB CORNEll· ERIE SPRAGUE AND CAP. VOLT PART No. PART No. PART No. DUBILIER PART No. PART No. INSTALLATION NOTES

PART No. .022 600 46A180 P688·022 6TM-S22 Fixed Padder .25 200 46AT254J P488-2S GT2P25 2TM-P2S RF Bypass 220 47B20221KS SI220 D6-221 5R5T25 GP2K-221 5GA-T22 Diode RF Filter 220 47B20221K5 SI220 D6-221 SR5T25 GP2K-221 SGA-T22 Diode RF Filter .02 600 46AY203J P688-02 DF-203 PTE6S2 6TM-S2 Audio Coupling .02 600 46AY203J P688-02 DF-203 PTE6S2 6TM-S2 Audio Coupling .02 600 46AY203J P688-02 DF-203 PTE6S2 6TM-S2 Audio Coupling 220 47B20221K5 SI220 D6-221 5R5T25 GP2K-221 5GA-T22 RF Bypass .005 600 46AY502J P688-005 D6-502 PTE6DS GP2-333-502 6TM-D5 Tone Compo .02 600 4SAY203J P688-02 DF-203 PTESS2 STM-S2 Audio Coupling .01 600 46X35X1031 P688-OJ D6-103 PTE6S1 GP2-333-103 6TM-Sl Output Plate .02 600 46AY203J P688-02 DF-203 PTE6S2 6TM-S2 BFO Fee<lPack 470 SOO 47X20B471K 1469-000S 5R5T5 MS-35 BFO Grid Cap. S60 SOO 47X20D561J Fixed Trimmer .02 600 46AY203J P688-02 DF-203 PTE6S2 6TM-S2 RF Bypass 47 47X20UK470K SI47 DS-470 SRSQ5 GPIK-470 5GA-Q47 BFO Coupling .05 200 46AU503J P288-0S DF-503 PTE4S5 2TM-S5 Noise Limiter Filter .01 600 46X35X103J P688-0I D6-IOS PTE6S1 GP2-333-103 6TM-Sl Line Filter

CONTROLS RATING

REPLACEMENT DATA Hallicrafters

IRC CLAROSTAT CENTRALAB INSTALLATION NOTES RESIST· WATTS PART No. PART No. PART No. PART No. ANCE

IOKn ,

25B590 Ql3-1l6 AM-81-Z B-lS Sensitivity Control , Shaft Not Req. Not Req. RS-2 Not Req. Attach to RIA Per Instructions. SOOKn ! 25BS34 Q13-133 AM-60-Z B-60 Volume Control Shaft Not Req. Not Req. RS-2 Not Req. Attach to R2A Per Instructions. SOOKn ! 25B605 Q13-133 AG-60-Z B-60-S Tone Control Shaft Not Req. Not Req. RS-2 Not Req. Attach to R3A Per Instructions. Switch Not Req. 76-1 SWB Not Req. Attach to R3A Per Instructions. 500n 4 RTV-25 "s" Meter Adjustment-Wire Wound

RESISTORS REPLACEMENT DATA

I RATlNG Hallicrafters IRC IDENTIFICATION CODES

PART No. RESISTANCE WATTS PART No. 22n 1 23X20X220K Parasitic Suppressor ! 15n I 23X20XI50K Parasitic Suppressor IMeg ! 23X20XIOSK BTS-IMeg RF Amp. Grid 180n , 23X20X181K BTS-180 RF Amp. Cathode 39Kn I 23X30X393K BTA-39K RF Amp. Screen 1000n

, 23X20XI02K BTS-1000 RF Choke Shunt ! 3300n I 23X20X332K BTS-3300 RF Amp. Plate

3300n , 23X20X332K BTS-3300 RF Amp. Plate 6800n l 23X30X682K BTA-6800 RF Amp. Plate 3300n I 23X20X332K BTS-3300 RF Amp. Plate Decoupling 15n "1 23X20Xl50K Parasitic Suppressor 1.5Meg

f 23X20XI5SK BTS-1. SMeg l650KC Mixer Grid-See Note 1

22000 23X20X222K BTS-2200 1650 KC Mixer Cathode 330Kn i 23X20X334K 'BTS-330K 1650 KC Mixer Screen 3300n 23X20X332K BTS-3300 1650 KC Mixer Plate Decoupling 22Kn ! 23X20X223K BTS-22K Osc. Grid 10Kn 1 23X30X103K BTA-I0K Osc. Plate 15n 1 23X20XI50K Parasitic Suppressor 120Kn f 23X20X124K BTS-120K AVC Network-See Note 2 lOOn t 22X20XIOIK BTS-100 16S0KC IF Amp. Cathode 82000 I 23X20X822K BTS-8200 1650 KC IF Amp. Screen 3300n ! 23X20X332K BTS-3300 1650 KL IF Amp. Plate Decoupling 270n , 23X20X271K BTS-270 "S" Meter Shunt

ITEM No.

LI

ITEM No.

L2 L3 L4 LS L6 L7 L8 L9A LOB LIO LIl L12 L13 L14 LI5 L16 L17 LI8 L19 L20 L21

L22

ITEM No.

M! M2 M3 M4

PARTS LIST AND DESCRIPTIONS (Continued) FILTER CHOKE

RATINGS I REPLACEMENT DATA TOTAL I D C I INDUCTANCE I STAN COR

I MERIT I CHICAGO

INSTALLATION DIRECT .. to CURRENT IHalliCrafters NOTES CURRENT RESISTANCE 1000 "') PART No. PART No. PART No. PART No.

.105A I 330n 19 Henries I 56B107 I IC-2995 @ I R-231l0@ (2) One new mounting hole.

COILS (RF-IF) REPLACEMENT DATA

USE DC RES. MEISSNER NOTES Hallicrafters

PRJ. SEC. PART No. PART No. Ant. Coil .20 on 51BI325 Band 4 Ant. Coil .3n .m SlBI324 Band 3 Ant. Coil .4n 1. sn 51BI323 Band 2 Ant. Coil 28n 5.8n SI111322 Band 1 RF Choke .31l 53A215 RF Coil 1.3n on 5lBI327 Band 4 RF Coil 9n .m 51B1326 Band 3 RF Coil 1.5n SlBI319 Band 2 L9A and 9B wound on same RF Coil 6.51l Band 1 Form Osc. Coil 21l .m 51Bl321 Band 4 Osc. Coil .5n .m 51BI320 Band 3 Osc. Coil .sn .9n 5lB1329 Band 2 Osc. Coil .7Il 2n S1BI328 Band 1 1st IF .8n .8n 50B488 1650KC 2nd IF .an .8n 50B488 1650KC Osc. Coil .41l 50B490 1600KC (Tap 21l) 1st IF Pri. 32n 50B489 50KC (Tap 14n) 1st IF Sec. 32n 50B489 50KC (Tap 14n) 2nd IF Pri. 320 50B489 SOKC (Tap 14n) 2nd IF Sec. 32n SOB489 50KC (Tap 14n) BFO Osc. Coil 1001l 54B04S (Tap 69n) RF Choke 9n 53AI07

DIAL LIGHTS REPLACEMENT DATA

BASE TYPE VOLTS AMPS. BEAD /Hallicrafters NOTES COLOR

PART No. Bayonet 6-8 .25 Blue 39A003 Type number 44. Bayonet 6-8 .25 Blue 39A003 Type number 44. Bayonet 7.5 I .2 White Type number 51. Bayonet 7.5 .2 White Type number 51.

MISCELLANEOUS ITEM

PART NAME HALLICRAFTERS NOTES No. PART No.

M5A Switch 62BOS3 Band, Ant. Section B Switch 62BOS3 Band, RF Section C Switch 62BOS4 Band, Osc. Grid Section D Switch 62B055 Band, Osc. Plate Section

M6 Switch 60B399 Selectivity M7 Switch 60A138 AVC M8 Switch 60A138 AM-CW M9 Switch 60A192 Receiver-Standby MlO Switch 60AI38 Limiter Mil Meter 82C183 Carrier Level MI2 3 Gang Var. Cap . 48C244 (12-420MMF) Each Section M13 3 Gang Var. Cap. 48C243 Bandspread

Cabinet 66D652 Dial Scale 83B387 Main Dial Scale 83B388 Bandspread

Item

VI

V2

V3

V4

V5

V6

V7

va V9

V 10

VII

Item

V I

V2

V3

V4

V5

V6

V7

va V9

V 10

VII

VOLTAGE READINGS

Tube Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Phi 7 Pin 8

SCBS OV 26VDC OV S.3VAC 2S0VDC 2SSVDC 2SVDC

SAU6 -3. SVDC OV OV S.3VAC 2SSVDC 70VDC 4.6VDC

SC4 8SVDC OV OV S.SVAC 8SVDC i-llVDC OV

6BA6 0V' 2SVDC OV S.3VAC 2S0VDC 13SVDC 26VDC

SBES i-1.8VDC !.4VDC OV 6.3VAC 260VDC 8SVDC ov

SBA6 OV 2SVDC OV S 3VAC 250VDC 220VDC 26VDC

6ALS OV -.IVDC OV 4.3VAC OV OV -.IVDC -. SVDC

6SC7 OV. .llSVDC .-S.IVDC -.SVDC 9SVDC OV OV 6.SVAC

6KSGT OV OV 265VDC 260VDC OV 280VDC 6.SVAC 16VDC

VR-15(f'ODS OV OV 140VDC 2S0VDC 140VDC OV 40VDC OV

SYSGT 260VDC 280VDC OV 280VAC OV 280VAC OV 280VDC

Tube Pin 1

SCB6 4.7Meg

6AUS 1.5Meg

SC4 tl3KO

6BAS 3.8Mel(

6BES 22KO

SBA6 IMel(

6AL5 3900

6SC7 00

6K6GT Inf.

VR-lS(f'OD3 Inf.

5Y3GT t3300

RESISTANCE READINGS

Pin 2 Pin 3 Po. 4 Pin 5 Pin 6

IOKO 00 .m tlOKO tS9KO

00 00 .m t3.SKO tS3OKO

Inf. 00 .m tISKO 22KO

IOKO 00 .m t3.6KO _illKO

1500 00 .m t3.SKO tl3KO

IOKO 00 .m t3.SKO t42KO

1.5Meg 00 2.50 2.4Meg Inf.

t·42KO 12OKO ISMel( t230KO 00

00 t3700 t3300 47OKO toO

00 p.3KO t3300 p.3KO Inf.

4OKO Inf. 700 Inf. 780

• CW AND AM SWITCH IN CW POSITION. § TAKEN WITH VACUUM TUBE VOLTMETER. ALL MEASUREMENTS TAKEN IN BC BAND #1 • • CW AND AM SWITCH IN CW POSITION. t MEASURED FROM PIN B OF VII. SELECTIVITY SWITCH IN BROAD I. AVC SWITCH IN ON POSITION. NOISE LIMITER SWITCH IN ON POSITION.

Pin 7

IOKO

2.2KO

00

IOKO

.80

IOKO

4SOKO

00

.m t3.3KO

Inf .

1. DC Voltage measurements are at 20,000 ohms per volt; AC Voltages measured at 1,000 ohms.

4. Line voltage maintained at 117 volts for voltage readings.

5. Nominal tolerance on component valu~s makes possible a variation of ::!:15% in voltage and resistance readings.

2. Socket connections are shown as bottom views.

3. Measured values are from socket pin to common negative.

6. Volume control at maximum, no signal ap­plied for voltage measurements.

Pin 8

.m 3900

Inf.

40KO

E---,V5

126 111 V'.10

@DO~0 ~ ______ *--, SECT.2. 0 0 0 8 REAR 7

A PHOTOFACT STANDARD NOTATION SCHEMATIC

© Howard W. Sams & Co., Inc. 1951

~p~ l8N%oL U P +

@:r:: .0' ~ !~

~ 10K

itV11 : 5Y3)lGT 4 2 = @) 6 8 T 10K

+ ~ ''i';t 60 ,.20_20 MFOI ~ MfD ~ MFD -=:;;- -;- -

JUMPER PLUG F"OR A C OPERATION

4 5 3 •• 6

:. 1 2 ••

8

®

fJANn SWITCH SHOWN IN BAND 1 POSI nol'

SW SE"UENCE I-BAND i 2_BAN[l2 3-BAND 3 4-BANlJ 4

@ 3300 .......

47 MMF

I @~02

220..... 1 ~©:~ @J 2~~O

SE.CT2 5~ 1 REAR ~

@l 220K

SELECTlVITY SWITCH ~mOWN IN POSITION 1

SWITCH SI::\.iUJ::NCE i-BROAD 2-BROAD 3_NORMAL 4-SHARP 5-SHARP i3-PHONO

IF= 1650 KC

IF= 50 KC

+ @J 560~

~2[+ @ 10 MFO- 390.n.

rJH-x, TO SPEAKER

.1.2_ 500 ....

~

143-9

AliGNMENT INSTRUCTIONS READ CAREFULLY BEFORE ATTEMPTING AliGNMENT To set dial turn bIDing gang fully closed and set the zero on the logging scale under the dial Index line. Turn the noise limiter and AVe switches to "off", send-receive switch to "receIve", CW/AM switch to AM, and the band selector to "band 2". Turn both main bIDing and bandspread capacitors to balf meshed. During alignment of the 50KC IFs, (step I), remove the first oscillator tabe, (V3). from Its socket to prevent signal Interference Connect a 3. 2 or 5001) speaker.

DUMMY SIGNAl. SIGNAL BAND RADIO CONNECT GENERATOR ?:~~~~ SW,giH S~~G ADJUST REMARKS ANTENNA COUPLING VTVM

1. .00MFD. High side to term .. 50KC 2 Tuning gang 'Use VTVM AI, A2, Adjust in the order given for ina! I on L15. Low (unmod.) half meshed. DC Probe t A3, A4 maximum deflection~ Then side to chassis. Point A • repeat the adjustments In the

Common to same order. chassis.

2. " High side to stator 1650KC " " " A5, A6, Replace V3. Adjust A5 for on center section of A7, AS, maximum deflection. Then main tuning gang. A9 retune signal gen. for maximum Low side to chassis. deflection . Adjust A6, A7, AS,

and A9 for maximum deflection, at the new frequency. Rotate the selectivity switch from step 5 to step 1. The reading on the VTVI should decrease progressively, if not repeat step.I.

" High side to 50KC " ., Use speaker Turn CW/AM switch to !lew".

terminal I on· LI5. (unmod.) as indicator Remove pitch control knob. 3.

Low side to chassis. Turn pitch control shaft for zero beat indication on speaker. Replace knob with indicator line straight up. Turn switch back t6"AM".

Turn the BAND SPREAD, VOLUME, TONE, and SENSITIVITY controls fully clockwise. Turn iIle SELECTIVITY switch to 3. Leave all other controls as set.

4. 3301) High side thru 3301) 30MC 4 30MC DC Probe AIO,All Adjust for maximum deflection. carbon to antenna terminal (400'\. Mod. to Point A • AI2 resistor "AI", (connect link) Common to

Low side to chassis chassis.

5. " " 14MC .. 14MC " AI3,AI Adjust for maximum qeflection. AI5 Repeat steps 4 and 5 until no

further improvement can be made.

6. " " 1l.5MC 3 11.5MC " AI6,AI Adjust for maximum deflection. AlB

7. 0, " 5.IMC " 5.IMC " A19,A2 Adjust for DDXimum deflection.

A21 Repeat steps 6 and 7 until no further improvementscan be made.

8. " " 4.6MC 2 4.6MC " A22,A23 Adjust for maximum deflection. A24

9. " " 1. 925MC " I. 925MC " A25 Adjust for maximum deflection. Repeat steps 8 and 9 until no further improvement can be made.

10. " " 1400KC I 1400KC " A26, Adjust for maximum deflection. A27,A2

11. 0' " 600KC " 600KC " " A29 Adjust for maximum deflection. Repeat steps 10 and 11 until no further improvement can be made.

MAIN TUNING & BANDSPREAD GANGS FULLY CLOSED

BANDSPREAD GANG

~ I/~ TURNS ~ 1/2 TURNS

DIAL CORD DRIVE